69P/Taylor
| Parameter |
Value |
| Designation |
69P/Taylor |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-03-18T11:29:12.543360Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T11:21:12Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
17.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-06-18.0000000 |
| e |
0.41360765 |
| q (au) |
2.280445 |
| a (au) |
3.888940 |
| i (deg) |
22.041043 |
| Ω (om, deg) |
104.853333 |
| ω (w, deg) |
343.666052 |
| M (ma, deg) |
231.036957 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.538 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.538 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.771 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
00:11:11.60 |
-18:27:32.7 |
HIP 893 |
7.55 |
| 2026-02-03 12:00 |
00:11:49.85 |
-18:21:57.3 |
HIP 932 |
14.50 |
| 2026-02-04 00:00 |
00:12:28.22 |
-18:16:21.7 |
HIP 983 |
20.53 |
| 2026-02-04 12:00 |
00:13:06.70 |
-18:10:45.8 |
HIP 983 |
19.78 |
| 2026-02-05 00:00 |
00:13:45.29 |
-18:05:09.6 |
HIP 1160 |
23.06 |
| 2026-02-05 12:00 |
00:14:23.98 |
-17:59:33.2 |
HIP 1160 |
26.35 |
| 2026-02-06 00:00 |
00:15:02.78 |
-17:53:56.4 |
HIP 1317 |
21.61 |
| 2026-02-06 12:00 |
00:15:41.69 |
-17:48:19.5 |
HIP 1317 |
13.49 |
| 2026-02-07 00:00 |
00:16:20.71 |
-17:42:42.2 |
HIP 1317 |
11.46 |
| 2026-02-07 12:00 |
00:16:59.83 |
-17:37:04.7 |
HIP 1433 |
12.90 |
| 2026-02-08 00:00 |
00:17:39.06 |
-17:31:26.9 |
HIP 1433 |
4.10 |
| 2026-02-08 12:00 |
00:18:18.40 |
-17:25:48.9 |
HIP 1433 |
10.28 |
| 2026-02-09 00:00 |
00:18:57.83 |
-17:20:10.7 |
HIP 1498 |
18.71 |
| 2026-02-09 12:00 |
00:19:37.37 |
-17:14:32.2 |
HIP 1608 |
13.13 |
| 2026-02-10 00:00 |
00:20:17.02 |
-17:08:53.4 |
HIP 1608 |
5.61 |
| 2026-02-10 12:00 |
00:20:56.77 |
-17:03:14.5 |
HIP 1608 |
11.59 |
| 2026-02-11 00:00 |
00:21:36.61 |
-16:57:35.3 |
HIP 1608 |
21.98 |
| 2026-02-11 12:00 |
00:22:16.56 |
-16:51:55.9 |
HIP 1791 |
19.24 |
| 2026-02-12 00:00 |
00:22:56.61 |
-16:46:16.4 |
HIP 1791 |
12.46 |
| 2026-02-12 12:00 |
00:23:36.77 |
-16:40:36.6 |
HIP 1913 |
10.32 |
| 2026-02-13 00:00 |
00:24:17.02 |
-16:34:56.6 |
HIP 1913 |
11.30 |
| 2026-02-13 12:00 |
00:24:57.37 |
-16:29:16.4 |
HIP 1913 |
19.98 |
| 2026-02-14 00:00 |
00:25:37.81 |
-16:23:36.0 |
HIP 2014 |
15.65 |
| 2026-02-14 12:00 |
00:26:18.36 |
-16:17:55.5 |
HIP 2014 |
14.79 |
| 2026-02-15 00:00 |
00:26:59.00 |
-16:12:14.7 |
HIP 2190 |
15.81 |
| 2026-02-15 12:00 |
00:27:39.74 |
-16:06:33.9 |
HIP 2247 |
14.89 |
| 2026-02-16 00:00 |
00:28:20.57 |
-16:00:52.8 |
HIP 2247 |
13.10 |
| 2026-02-16 12:00 |
00:29:01.50 |
-15:55:11.6 |
HIP 2247 |
19.46 |
| 2026-02-17 00:00 |
00:29:42.53 |
-15:49:30.3 |
HIP 2386 |
11.91 |
| 2026-02-17 12:00 |
00:30:23.64 |
-15:43:48.8 |
HIP 2386 |
11.13 |
| 2026-02-18 00:00 |
00:31:04.85 |
-15:38:07.1 |
HIP 2386 |
19.15 |
| 2026-02-18 12:00 |
00:31:46.16 |
-15:32:25.4 |
HIP 2655 |
27.20 |
| 2026-02-19 00:00 |
00:32:27.55 |
-15:26:43.5 |
HIP 2655 |
17.23 |
| 2026-02-19 12:00 |
00:33:09.04 |
-15:21:01.6 |
HIP 2655 |
10.82 |
| 2026-02-20 00:00 |
00:33:50.62 |
-15:15:19.5 |
HIP 2655 |
14.23 |
| 2026-02-20 12:00 |
00:34:32.28 |
-15:09:37.3 |
HIP 2655 |
23.54 |
| 2026-02-21 00:00 |
00:35:14.04 |
-15:03:55.0 |
HIP 2846 |
13.10 |
| 2026-02-21 12:00 |
00:35:55.88 |
-14:58:12.6 |
HIP 2846 |
1.77 |
| 2026-02-22 00:00 |
00:36:37.81 |
-14:52:30.2 |
HIP 2846 |
10.22 |
| 2026-02-22 12:00 |
00:37:19.83 |
-14:46:47.7 |
HIP 3013 |
19.62 |
| 2026-02-23 00:00 |
00:38:01.93 |
-14:41:05.1 |
HIP 3013 |
19.33 |
| 2026-02-23 12:00 |
00:38:44.12 |
-14:35:22.4 |
HIP 3039 |
21.42 |
| 2026-02-24 00:00 |
00:39:26.40 |
-14:29:39.7 |
HIP 3134 |
13.07 |